/Engine/Source/Runtime/Engine/Classes/Materials/Material.h
Backs up all material shaders to memory through serialization, organized byFMaterialShaderMap. This will also clear allFMaterialShaderMapreferences to FShaders.
static void BackupMaterialShadersToMemory ( [TMap](API\Runtime\Core\Containers\TMap)< class [FMaterialShaderMap](API\Runtime\Engine\FMaterialShaderMap) *, [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [TArray](API\Runtime\Core\Containers\TArray)< uint8 > > > & ShaderMapToSerializedShaderData )